Why not?
Before I was into guitar, I was into building my home theater. I needed alot of speaker wire for my surround system. I remember all the sales guys trying to sell me Monster speaker cables. I could get an entire spool of better quality speaker wire from Radio Shack.
I avoid their products because of their business practices, and because they are one of the worst values out there.
My guitar-to-board cable is a Bullet coil, and I am very happy with it. My board-to-amp cable is a Yorkville Studio One, and I'm very happy with that as well. I build my own pedal board cables using Mogami conductor.
Let's lay out some pros and cons:
Pro
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Warranty (I broke one (being stupid) and got a free new one as soon as I walked in the store)
They sound better than cheap cables
Con
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Other brands might not replace a broken cable
Very little strain relief on the hi-end Monsters
Not the most durable
Their business philosophy is not worth supporting
People might look at you funny for using Monster cables
has anyone replaced the connectors on their higher-end Monster cable? I haven't broken the shrink wrap on the connection (after you screw the barrel back), so I can't see if the wire is easy to solder or not.